Vertical extrusion type sludge treatment system and method

Abstract

The invention relates to the technical field of sludge treatment, and particularly discloses a vertical extrusion type sludge treatment system and method.The vertical extrusion type sludge treatment system comprises a material distributing mechanism and a filter pressing mechanism, and the material distributing mechanism is used for conveying composite filter cloth wrapped with sludge to the filter pressing mechanism; the filter pressing mechanism comprises a filter pressing cavity used for stacking composite filter cloth and filtering water; at least one movable filtering assembly is arranged in the extrusion cavity in the vertical direction; the hydraulic mechanism is used for applying vertical pressure to the composite filter cloth stacked in the filter pressing cavity. The at least one movable filter assembly is arranged in the extrusion cavity in the vertical direction, and the movable filter assembly is adaptively designed, so that in the stacking process of the composite filter cloth, the stacking of the filter cloth is not influenced, and the stacked composite filter cloth is separated and supported by the movable filter assembly, so that the efficiency of the filter cloth is improved. In addition, the movable filter assembly has an extrusion effect on the composite filter cloth on the two sides of the movable filter assembly, so that the filter pressing effect can be improved.

Description

A vertical compression sludge treatment system and method Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a vertical extrusion sludge treatment system and method. Background Technology

[0002] Deep dewatering of sludge is an important step in sludge treatment. Sludge presses are common sludge filter presses. A sludge press is a device that achieves deep dewatering of sludge through vertically arranged extrusion chambers. Its working principle is based on the synergistic effect of high pressure extrusion and physical filtration to dewater sludge with high water content. It can reduce the water content of sludge to below 70% by using mechanical deep dewatering technology.

[0003] When using a sludge extruder, a sludge feeder is usually required. The feeder wraps the sludge between filter cloths and stacks them inside the extrusion chamber of the sludge extruder. For example, CN118833990A – Fully Automatic Feeder for Sludge Treatment – ​​discloses a method of wrapping sludge between two filter cloths and then stacking them in a feed cylinder. It mainly includes a frame, a conveyor belt device, a feeding trolley, an upper winding / unwinding system, and a lower winding / unwinding system. The upper winding / unwinding system winds and guides the upper filter cloth to the conveyor belt device; the lower winding / unwinding system winds and guides the lower filter cloth to the conveyor belt device. The conveyor belt is used to transport the filter cloth to the cloth trolley. The cloth trolley stacks the filter cloth containing sludge into the material cylinder by reciprocating. Although it solves the problems of heavy weight and low reliability caused by using the whole frame to reciprocate to stack the filter cloth, it has the following problems: 1) Directly stacking the filter cloth containing sludge into the material cylinder for filtration cannot reduce the moisture content of the sludge to an optimal state. It can reduce the moisture content of the sludge to below 70%, and there is still room for further reduction in the moisture content of the sludge; 2) It does not mention how to recover the filter cloth and filter cake after filtration. Summary of the Invention

[0004] The purpose of this invention is to provide a vertical compression sludge treatment system and method to further reduce the moisture content of sludge.

[0005] This invention is achieved through the following technical solution: a vertical extrusion sludge treatment system, comprising a cloth feeding mechanism and a filter press mechanism. The cloth feeding mechanism is used to convey composite filter cloth encased in sludge to the filter press mechanism. The filter press mechanism includes a filter chamber for stacking the composite filter cloth and filtering water. The filter chamber includes a filter shell, and the filter shell is divided by a filter plate to form an upper extrusion chamber and a lower water filtering chamber. At least one movable filter assembly is arranged vertically in the extrusion chamber. The movable filter assembly includes two guide cylinders symmetrically arranged on the inner wall of the extrusion chamber. The bottom of the guide cylinders is elastically connected to the extrusion chamber to adapt to the height change of the stacked composite filter cloth during the extrusion filtration process, ensuring that the composite filter cloth below the movable filter assembly is not unable to be extruded due to the presence of the movable filter assembly. The length of the guide cylinders is specified. The direction is parallel to the direction of movement of the composite filter cloth when it is stacked. Multiple support members are slidably arranged between the two guide cylinders, and adjacent support members are elastically connected. A linear displacement mechanism is set inside the guide cylinder. Two support members are located at both ends. One support member is connected to one end of the guide cylinder, and the other support member is connected to the linear displacement mechanism. The two support members at this end (one end of the linear displacement mechanism) are used to insert the composite filter cloth. The linear displacement mechanism drives the other support member to reciprocate, so as to realize the unfolding or retraction of multiple support members and to realize the stacking of composite filter cloth in the filter pressing chamber. When the movable filter assembly is covered by the composite filter cloth, the multiple support members in the covered movable filter assembly remain in the unfolded state. A hydraulic mechanism is used to apply vertical pressure to the composite filter cloth stacked in the filter pressing chamber.

[0006] The inventive concept of this invention lies in improving the filtration effect by modifying the extrusion chamber. This invention achieves a dual effect by setting movable filter components in the extrusion chamber: 1) When the composite filter cloth containing sludge is stacked in the extrusion chamber, movable filter components are inserted vertically at intervals. The movable filter component frame can move slightly in the vertical direction to adapt to the overall height change during the filtration process. Compared with direct stacking, the movable filter components are used to separate and support the stacked composite filter cloth, which is conducive to the flow of water from the upper layer to the lower layer. That is, the sludge layer is physically divided by multiple support components, which shortens the thickness of the sludge layer and can also significantly improve the water discharge rate. Moreover, the movable filter components have a squeezing effect on the composite filter cloth on both sides, which can improve the filtration effect and reduce the sludge moisture content to below 60%; 2) By optimizing the structure of the movable filter components, multiple support components are reciprocated under the action of a linear displacement mechanism to realize the stacking of filter cloth in the extrusion chamber.

[0007] In summary, the present invention can not only further reduce the moisture content of sludge, but also eliminates the need to install a material feeding trolley outside the extrusion chamber.

[0008] In a preferred embodiment, the distance between two supports located on both sides of the composite filter cloth is smaller than the distance between any two other adjacent supports.

[0009] To achieve better movement of the composite filter cloth, the distance between the two supports on both sides of the composite filter cloth should be slightly greater than the thickness of the composite filter cloth. The reason for setting the distance between other adjacent supports to be relatively large is that if the distance between other adjacent supports is too small, a large number of supports will be required to ensure that multiple supports are evenly distributed in the extrusion chamber when unfolded. When multiple supports occupy a large lateral width on one side of the extrusion chamber, it will not be conducive to the stacking of the composite filter cloth in the extrusion chamber. This will result in a lower overall width of the stacked composite filter cloth, and the gap between the composite filter cloth and the extrusion chamber will lead to wasted space.

[0010] To avoid the problem of low space utilization caused by multiple supports occupying a large lateral width on one side of the extrusion chamber when multiple supports are retracted, in a preferred embodiment, one side wall of the filter shell protrudes outward to form an extension cavity, and when multiple supports are in the retracted state, multiple supports are placed in the extension cavity.

[0011] In other words, by setting an extension cavity on one side of the extrusion cavity, when multiple support members reciprocate with the linear displacement mechanism, the present invention can ensure that when the composite filter cloth is stacked by reciprocating movement, the vertical section of the composite filter cloth moves as close as possible to the inner wall of the extrusion cavity when it moves to both sides of the extrusion cavity, so that the width of the stacked composite filter cloth is almost the same as the width of the extrusion cavity, thus avoiding space waste.

[0012] In a preferred embodiment, both symmetrical sidewalls of the filter housing protrude outward to form an extension cavity; when multiple supports are in the unfolded state, multiple supports located on one side of the composite filter cloth are moved out of the extension cavity and placed in the extrusion cavity, and one support located on one side of the composite filter cloth is located in the extension cavity, ensuring that the vertical section of the composite filter cloth can be as close as possible to the inner wall of the extrusion cavity when it is moved to both sides of the extrusion cavity.

[0013] In a preferred embodiment, the bottom ends of the guide cylinder are connected to the bottom of the extension cavity via elastic supports to ensure that each layer of composite filter cloth can be squeezed and filtered within the squeezing cavity.

[0014] In a preferred embodiment, the support member includes a first support body and a second support body, the second support body being slidably connected to the first support body, the second support body being placed inside the first support body when the support member is in a retracted state, and the second support body being removed from the first support body when the support member is in an extended state; in two adjacent support members, the second support body of one support member is elastically connected to the first support body of the other support member.

[0015] The support members configured in this invention can achieve the following: when multiple support members are in a retracted state, they occupy a small lateral width; and when multiple support members are in an extended state, they have a large support area.

[0016] In a preferred embodiment, the guide cylinder is provided with a guide groove, through which another support member is connected to the linear displacement mechanism.

[0017] In a preferred embodiment, the support includes a first support body and a second support body; the top of the guide cylinder is also provided with a guide groove that cooperates with the second support body to better accommodate the movement of the second support body.

[0018] In a preferred embodiment, the cloth feeding mechanism includes: an upper filter cloth conveying mechanism for receiving and releasing the upper filter cloth in the composite filter cloth; a lower filter cloth conveying mechanism for receiving and releasing the lower filter cloth in the composite filter cloth; a feeding mechanism for introducing sludge between the upper and lower filter cloths; and a conveying mechanism for conveying the composite filter cloth to the filter press chamber.

[0019] Since the movable filter assembly installed in the extrusion chamber of the present invention can realize the stacking of composite filter cloth in the extrusion chamber by the reciprocating movement of multiple support members, the fabric feeding mechanism of the present invention does not need to be equipped with a fabric feeding trolley for reciprocating movement.

[0020] In a preferred embodiment, the end of the conveying mechanism is provided with a sealing mechanism, which includes a support base and a lifting mechanism arranged vertically opposite each other; a first clamping plate is provided on the top of the support base, and a second clamping plate is adsorbed at the lower end of the lifting mechanism through an upper adsorption mechanism; the second clamping plate and the first clamping plate are detachably connected under the compression of the support base and the lifting mechanism.

[0021] In the initial stacking stage, if the ends of the composite filter cloth that has just entered the squeezing chamber are not sealed, although there is a certain degree of adhesion between the sludge and the upper and lower filter cloths, the vertical setting of the composite filter cloth entering the squeezing chamber will cause the sludge to detach from the filter cloth and fall to the bottom of the squeezing chamber due to its weight, which is not conducive to the subsequent sludge removal. Furthermore, after the sludge has been squeezed and filtered in the squeezing chamber, the filter cloth and sludge cake need to be recovered by winding up the upper and lower filter cloths. When the recovery reaches the end, the composite filter cloth mixed with sludge cake is in a vertical state, and the sludge cake falls into the squeezing chamber under its own gravity, which is not conducive to the sludge cake removal.

[0022] This invention uses a sealing mechanism to seal the upper and lower filter cloths, thus preventing sludge and sludge cake from falling off.

[0023] In a preferred embodiment, the top of the support base is provided with a first clamping plate via a lower suction mechanism; the second clamping plate is provided with a plurality of protrusions, and the first clamping plate is provided with a slot corresponding to the protrusions.

[0024] The present invention facilitates the resetting of the second clamping plate and the first clamping plate by means of the lower adsorption mechanism when winding up the upper and lower filter cloths.

[0025] In a preferred embodiment, the fabric feeding mechanism further includes a mud cake collecting mechanism, which includes a mud cake collecting trough. The mud cake collecting trough is located at the junction of the lower filter cloth conveying mechanism and the conveying mechanism and is used to receive mud cakes that fall during the recycling of the lower filter cloth. A mud cake conveying mechanism is provided at the lower end of the mud cake collecting trough.

[0026] This invention, by setting up a mud cake collection mechanism, can automatically recover mud cakes during the process of rolling up the upper and lower filter cloths.

[0027] In a preferred embodiment, the fabric mechanism further includes a filter cloth cleaning mechanism, which comprises a filter cloth cleaning transport mechanism and a cleaning mechanism; the filter cloth cleaning transport mechanism is used to guide the filter cloth to be cleaned into the cleaning mechanism for cleaning, and to roll up the cleaned filter cloth.

[0028] The filter cloth cleaning mechanism of the present invention can realize automatic cleaning and winding of filter cloth.

[0029] In a preferred embodiment, the system further includes a control unit comprising: an infrared sensor for acquiring the distance between the bottom of the movable filter assembly and the top of the already stacked composite filter cloth during the stacking process; a controller for receiving the distance signal acquired by the infrared sensor and determining whether to close the linear displacement mechanism and keep the multiple supports in the unfolded state based on the distance signal; the controller is also communicatively connected to the drive end of the hydraulic mechanism; and the controller is also communicatively connected to the drive ends of each component in the fabrication mechanism.

[0030] The control unit of the present invention can control the movable filter assembly in the extrusion chamber, and realize the stacking of composite filter cloth in the extrusion chamber by controlling the movable filter assembly.

[0031] The sludge treatment method based on the above-mentioned vertical extrusion sludge treatment system includes the following steps: S1, using a cloth-laying mechanism to wrap sludge between an upper filter cloth and a lower filter cloth to form a composite filter cloth, and then introducing the composite filter cloth into the filter press chamber; S2, ensuring that multiple support members are in an unfolded state, so that the composite filter cloth entering the filter press chamber is inserted between two adjacent support members; S3, using a linear displacement mechanism to reciprocate and move the composite filter cloth in the filter press chamber; specifically, when the end of the composite filter cloth reaches the filter plate, the linear displacement mechanism reciprocates and moves the support members reciprocating and moves them, switching the multiple support members between unfolded and retracted states to achieve the stacking of the composite filter cloth; when the composite filter cloth approaches the movable filter assembly, the multiple support members are kept in an unfolded state, and the upper movable filter assembly continues to work to achieve the upper stacking; S4, after the composite filter cloth is stacked, the hydraulic mechanism is started to perform filter pressing.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention arranges at least one movable filter component in the vertical direction in the squeezing chamber and makes an adaptive design for the movable filter component, so that during the stacking of composite filter cloth, it not only does not affect the stacking of filter cloth, but also enables the stacking of filter cloth without the need to set up a cloth trolley outside the squeezing chamber; and when the composite filter cloth containing sludge is stacked in the squeezing chamber, the movable filter components are inserted at intervals in the vertical direction. The movable filter components are used to separate and support the stacked composite filter cloth, which is conducive to the flow of water from the upper layer to the lower layer. The movable filter components have a squeezing effect on the composite filter cloth on both sides, which can improve the pressure filtration effect.

[0033] 2. The end of the conveying mechanism of the present invention is provided with a sealing mechanism. The sealing mechanism can realize the detachable connection between the upper filter cloth and the lower filter cloth located at the front end of the sludge. Specifically, the upper filter cloth and the lower filter cloth are fixed between the second clamping plate and the first clamping plate by the connection of the second clamping plate and the first clamping plate, thus realizing the sealing of the composite filter cloth and avoiding the problem of sludge and mud cake falling off. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and constitute a part of this application, do not constitute a limitation on the embodiments of the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the vertical compression sludge treatment system of the present invention; Figure 2 is a top view of Figure 1; Figure 3 is a left view of Figure 1; Figure 4 is a schematic diagram of the filter cloth transmission of the present invention; Figure 5 is a schematic diagram of the end-sealing mechanism of the present invention; Figure 6 is a schematic diagram of the filter press chamber of the present invention (first); Figure 7 is a cross-sectional view of Figure 6; Figure 8 is a schematic diagram of the filter press chamber of the present invention (second); Figure 9 is a cross-sectional view of Figure 8; Figure 10 is a schematic diagram of the movable filter assembly of the present invention; Figure 11 is a cross-sectional view of the guide cylinder of the present invention.

[0035] The attached diagram shows the following components and their corresponding names: 1-Feeding mechanism; 2-Upper filter cloth conveying mechanism; 3-Upper filter cloth; 4-Lower filter cloth conveying mechanism; 5-Lower filter cloth; 6-Conveying mechanism; 7-Filter press chamber; 8-Hydraulic mechanism; 9-Cake collection tank; 10-Cleaning mechanism; 11-Filter cloth cleaning and conveying mechanism; 12-End sealing mechanism; 21-Upper take-up and release roller; 22-Upper tension roller; 23-Upper drive roller; 24-Upper adjusting roller; 41-Lower take-up and release roller; 42-Lower tension roller; 43-Lower drive roller; 44-Lower adjusting roller; 71-Filter housing; 72-Modible filter assembly; 73-Filter plate; 74-Extrusion chamber; 75-Water filtration chamber; 76-Drain pipe; 711-Extension chamber; 721-Guide cylinder; 722-Support Support component; 723-Connecting line; 724-Elastic support component; 7211-Guide groove; 7212-Guide groove; 7213-Screw; 7214-Nut; 7221-First support body; 7222-Second support body; 91-Cake conveying mechanism; 111-Directional roller; 112-First tension roller; 113-Second tension roller; 114-First pressure roller; 115-Second pressure roller; 116-Third tension roller; 117-Fourth tension roller; 118-Take-up roller; 121-Support seat; 122-First clamping plate; 123-Lifting mechanism; 124-Upper adsorption mechanism; 125-Second clamping plate; 126-Lower adsorption mechanism; 100-Bracket; 101-Ladder; 200-Composite filter cloth. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. The embodiments described below are some, but not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, materials, or methods are not specifically described to avoid obscuring the invention. Unless otherwise specified, the materials, instruments, and reagents used in the following embodiments are commercially available. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] Example 1: As shown in Figures 1-11, in order to further reduce the moisture content of sludge, this example provides a vertical extrusion sludge treatment system, including a cloth feeding mechanism and a filter press mechanism. The cloth feeding mechanism is used to convey a composite filter cloth (200) containing sludge to the filter press mechanism.

[0040] Specifically, the fabric conveying mechanism of this embodiment includes: an upper filter cloth conveying mechanism 2, used to realize the take-up and release of the upper filter cloth 3 in the composite filter cloth 200; the upper filter cloth conveying mechanism 2 adopts the prior art, specifically CN118833990A, the upper filter cloth conveying mechanism 2 mainly includes an upper take-up and release roller 21, an upper tension roller 22, an upper transmission roller 23 and an upper adjusting roller 24, wherein the upper take-up and release roller 21 is used to take up the upper filter cloth 3, and it is connected to the power output shaft of the motor, and the upper filter cloth 3 is taken back or released by the forward and reverse rotation of the motor; the upper tension roller 22, the upper transmission roller 23 and the upper adjusting roller 24 are arranged sequentially at the rear end of the take-up and release roller 21 in the upper filter cloth 3 release direction, and are used to realize the conveying of the upper filter cloth 3.

[0041] The lower filter cloth conveying mechanism 4 is used to realize the take-up and release of the lower filter cloth 5 in the composite filter cloth 200. The lower filter cloth conveying mechanism 4 adopts existing technology, which can be found in CN118833990A. The lower filter cloth conveying mechanism 4 mainly includes a lower take-up and release roller 41, a lower tension roller 42, a lower drive roller 43, and a lower adjusting roller 44. The lower take-up and release roller 41 is used to take up the lower filter cloth 5. It is connected to the power output shaft of the motor. The lower filter cloth 5 is taken up or released by the forward and reverse rotation of the motor. The lower tension roller 42, the lower drive roller 43, and the lower adjusting roller 44 are arranged in sequence at the rear end of the lower take-up and release roller 41 in the release direction of the lower filter cloth 5 to realize the conveying of the lower filter cloth 5.

[0042] Feeding mechanism 1 is used to guide sludge between the upper filter cloth 3 and the lower filter cloth 5. Feeding mechanism 1 is located above conveying mechanism 6. Feeding mechanism 1 includes a feed pipe and a sludge pump. One end of the feed pipe is connected to the sludge storage tank, and the other end is provided with a uniform material bin. The uniform material bin is used to evenly drop sludge onto the lower filter cloth 5 located on conveying mechanism 6. The length of the outlet of the uniform material bin is similar to the width of the lower filter cloth 5, and the width of the uniform material bin gradually decreases from bottom to top.

[0043] The conveying mechanism 6 is used to convey the composite filter cloth 200 to the filter press chamber 7. The conveying mechanism 6 is existing technology and can specifically adopt a belt drive structure. The belt drive structure includes two drive rollers, which are connected by a belt drive.

[0044] In this embodiment, the upper filter cloth conveying mechanism 2, the lower filter cloth conveying mechanism 4, the feeding mechanism 1, and the conveying mechanism 6 are all mounted on the support 100. A walkway is provided on the support 100, and an escalator 101 is also provided on the support 100, connecting the ground and the walkway. The upper filter cloth conveying mechanism 2 and the lower filter cloth conveying mechanism 4 are respectively positioned above and below the feeding mechanism 1.

[0045] The process of forming composite filter cloth 200 in this embodiment is as follows: Start the conveying mechanism 6, the lower filter cloth conveying mechanism 4 and the upper filter cloth conveying mechanism 2. The lower filter cloth 5 is overlapped on the belt of the conveying mechanism 6. After the lower filter cloth 5 passes the feeding mechanism 1, the sludge pump is turned on to introduce sludge into the feeding mechanism and lay the sludge on the lower filter cloth 5. After the lower filter cloth 5 with sludge is moved out of the feeding mechanism 1 by the conveying mechanism 6, it is located under the upper filter cloth 3 being conveyed. Then, the upper filter cloth 3 and the lower filter cloth 5 are combined to form composite filter cloth 200 through a pressure roller. The composite filter cloth 200 enters the filter press mechanism under the transmission of the conveying mechanism 6 for stacking and filter press to remove water.

[0046] In this embodiment, the fabric mechanism also includes a mud cake collection mechanism, which includes a mud cake collection trough 9. The mud cake collection trough 9 is located at the junction of the lower filter cloth transmission mechanism 4 and the conveying mechanism 6, and is used to receive the mud cakes that fall off when recycling the lower filter cloth 5. A mud cake conveying mechanism 91 is provided at the lower end of the mud cake collection trough 9.

[0047] Specifically, the filter press mechanism in this embodiment includes a filter press chamber 7 for stacking the composite filter cloth 200 and filtering water. The filter press chamber 7 includes a filter shell 71, which is divided by a filter plate 73 to form an upper compression chamber 74 and a lower water filtering chamber 75. A drain pipe 76 is provided on the lower side wall of the water filtering chamber 75. In this embodiment, the filter shell 71 is a square cavity with an open top to accommodate the structure of the composite filter cloth 200 and facilitate the stacking of the composite filter cloth 200. Preferably, the lower section of the filter plate 73 is connected to the bottom of the water filtering chamber 75 by multiple support columns to improve the pressure bearing capacity of the filter plate 73. The greater the pressure, the lower the water content of the filtered mud cake. In this embodiment, the horizontal direction shown in Figure 6 is defined as the length of the water filtering chamber 75, and the horizontal direction perpendicular to the horizontal direction in Figure 6 is defined as the width of the water filtering chamber 75.

[0048] At least one movable filter assembly 72 is arranged vertically within the extrusion chamber 74. The number of movable filter assemblies 72 can be determined based on the actual height of the extrusion chamber 74. In this embodiment, two movable filter assemblies 72 are specifically provided. Each movable filter assembly 72 includes two guide cylinders 721 symmetrically arranged on the inner wall of the extrusion chamber 74, as shown in Figure 6. In this embodiment, the composite filter cloth 200 is stacked by reciprocating movement along the length direction of the extrusion chamber 74, i.e., the transverse direction in Figure 6. Therefore, the length direction of the guide cylinders 721 is parallel to the direction of movement of the composite filter cloth 200 when stacking it, i.e., the guide cylinders 721 are located on the side wall of the extrusion chamber 74 along its length direction. The bottom of the guide cylinder 721 is elastically connected to the squeezing chamber 74 to accommodate the height changes of the stacked composite filter cloth 200 during the squeezing filtration process. Specifically, four fixing plates can be set on the inner wall of the squeezing chamber 74. The bottom ends of the guide cylinder 721 are connected to the fixing plates through elastic support members 724. The elastic support member 724 can be a structure of spring and plastic pad. Specifically, the spring is set between two plastic pads, and the two plastic pads are respectively connected to the bottom of the guide cylinder 721 and the top of the fixing plate. Multiple support members 722 are slidably arranged between two guide cylinders 721. Adjacent support members 722 are elastically connected. In this embodiment, adjacent support members 722 are connected by a connecting line 723. In addition to the connecting line 723, other elastic members with shrinking function can also be used for connection. A linear displacement mechanism is provided inside the guide cylinder 721. Two support members 722 are located at both ends. One support member 722 is connected to one end of the guide cylinder 721, and the other support member 722 is connected to the linear displacement mechanism. A guide groove 7211 is provided on the upper end surface of the guide cylinder 721. The support member 722 is connected to the linear displacement mechanism through the guide groove 7211 and the support member 722 is reciprocated. The two support members 722 at this end are used to insert the composite filter cloth 200. The linear displacement mechanism drives the other support member 722 to reciprocate, so as to realize the expansion or contraction of multiple support members 722 and to realize the stacking of the composite filter cloth 200 in the filter press chamber 7. Specifically, as shown in Figures 6 and 8, the rightmost support member 722 is connected to the rightmost end of the guide cylinder 721 via a connecting line 723, and the leftmost support member 722 is connected to a linear displacement mechanism. The composite filter cloth 200 is inserted into the gap between the two leftmost support members 722, and the linear displacement mechanism drives the leftmost support member 722 to reciprocate. During the stacking of the composite filter cloth, when the movable filter assembly 72 is covered by the composite filter cloth 200, the multiple support members 722 in the covered movable filter assembly 72 remain in an unfolded state.

[0049] The linear displacement mechanism of this embodiment can be any existing technology that can achieve linear displacement, such as a screw drive structure or a hydraulic cylinder. In this embodiment, a screw drive structure is used, as shown in Figure 11. It includes a screw 7213 disposed in the guide cylinder 721, and a nut 7214 disposed on the screw 7213. The bottom of the leftmost support member 722 passes through the guide groove 7211 and the nut 7214 via a connecting rod. The two ends of the screw 7213 are rotatably disposed at the two ends of the guide cylinder 721. The screw 7213 is rotated by a motor, and the reciprocating movement of the nut 7214 is achieved by the rotation of the screw 7213.

[0050] In a preferred embodiment, the spacing between the two supports 722 located on both sides of the composite filter cloth 200 is smaller than the spacing between any two other adjacent supports 722.

[0051] The hydraulic mechanism 8 is used to apply vertical pressure to the composite filter cloth 200 stacked in the filter press chamber 7. The hydraulic mechanism 8 is located directly above the filter press chamber 7 and includes a hydraulic assembly and a squeezing plate. The squeezing plate is located at the telescopic end of the hydraulic assembly. The vertical displacement of the squeezing plate is controlled by controlling the telescopic stroke of the hydraulic assembly, thereby squeezing and filtering the composite filter cloth 200 stacked in the filter press chamber 7.

[0052] The sludge treatment method of the vertical extrusion sludge treatment system based on this embodiment includes the following steps: S1, the sludge is wrapped between the upper filter cloth 3 and the lower filter cloth 5 by the cloth-making mechanism to form a composite filter cloth 200, and the composite filter cloth 200 is introduced into the filter press chamber 7.

[0053] S2. The multiple support members 722 are in the unfolded state, as shown in Figures 8 and 9. Each support member 722 is evenly arranged in the length direction of the extrusion chamber 74. The composite filter cloth 200 that enters the extrusion chamber 74 is inserted between the two leftmost support members 722.

[0054] S3. The composite filter cloth 200 is stacked in the filter chamber 7 by reciprocating movement of the linear displacement mechanism. When the end of the composite filter cloth 200 reaches the filter plate 73, the linear displacement mechanism reciprocates and drives the support member 722 to reciprocate, so that multiple support members 722 can switch between unfolded and retracted states to achieve the stacking of the composite filter cloth 200. When the composite filter cloth 200 is placed to the lowermost movable filter assembly 72, the multiple support members 722 of the movable filter assembly 72 are kept in the unfolded state, and the upper movable filter assembly 72 continues to work to achieve the upper stacking. Specifically, when the end of the composite filter cloth 200 reaches the filter plate 73, the linear displacement mechanism drives multiple support members 722 to move to the right until the multiple support members 722 are close together, that is, the distance between two adjacent support members 722 reaches the minimum, as shown in Figures 6 and 7. At this time, the connecting line 723 is relaxed, and the vertical section of the composite filter cloth 200 moves from the leftmost to the rightmost. With the composite filter cloth 200 continuously moving downward in the extrusion chamber 74 under the conveying action of the conveying mechanism 6, the first layer of composite filter cloth 200 is stacked. Then, the linear displacement mechanism drives multiple support members 722 to move to the left until the multiple support members 722 are in an unfolded state. At this time, the connecting line 723 is taut, and the vertical section of the composite filter cloth 200 moves from the rightmost to the leftmost. With the composite filter cloth 200 continuously moving downward in the extrusion chamber 74 under the conveying action of the conveying mechanism 6, the second layer of composite filter cloth 200 is stacked. This process is repeated until all composite filter cloths 200 in the extrusion chamber 74 are stacked.

[0055] S4. After the composite filter cloth 200 is stacked, the hydraulic mechanism 8 is started to perform pressure filtration. The filtered water is continuously discharged through the drain pipe 76. After the pressure filtration is completed, the upper filter cloth transmission mechanism 2 and the lower filter cloth transmission mechanism 4 are operated to roll up the upper filter cloth 3 and the lower filter cloth 5, which drives the composite filter cloth 200 in the extrusion chamber 74 to move upward, completing the filter cloth recovery and mud cake export.

[0056] The composite filter cloth 200 stacked in the extrusion chamber 74 of this embodiment was press-filtered at a pressure of 2 MPa, and the mud cake was recovered. The measured moisture content of the mud cake was 68%. Similarly, the composite filter cloth 200 stacked in the conventional extrusion chamber 74 was press-filtered at a pressure of 2 MPa, and the mud cake was recovered. The measured moisture content of the mud cake was 72% (regular press-filtering). The composite filter cloth 200 stacked in the extrusion chamber 74 of this embodiment was press-filtered at a pressure of 20 MPa, and the mud cake was recovered. The measured moisture content of the mud cake was 58%. Similarly, the composite filter cloth 200 stacked in the conventional extrusion chamber 74 was press-filtered at a pressure of 20 MPa, and the mud cake was recovered. The measured moisture content of the mud cake was 67%. This shows that this embodiment has a significantly lower moisture content.

[0057] Example 2: This example is based on Example 1. The difference between Example 1 and Example 2 is that, in order to improve the space utilization rate in the extrusion chamber 74, the structure of the filter shell 71 is improved. Specifically, one side wall of the filter shell 71 protrudes outward to form an extension cavity 711. When the multiple support members 722 are in the retracted state, the multiple support members 722 are placed in the extension cavity 711.

[0058] In this embodiment, by setting an extension cavity 711, the length of the filter housing 71 at the position where the movable filter component 72 is set is extended, which can increase the distance that the composite filter cloth 200 can reciprocate within the extrusion cavity 74, and move the composite filter cloth 200 to both sides of the length direction of the extrusion cavity 74 as much as possible, thereby reducing the distance between the composite filter cloth 200 and the side wall of the extrusion cavity 74 after it is stacked.

[0059] The present embodiment is provided with an extension cavity 711. The schematic diagram of multiple support members 722 in a retracted state is shown in Figure 6. If the extension cavity 711 is not provided, the multiple support members 722 will move to the left, and it cannot be ensured that the composite filter cloth 200 can move to the side wall close to the extrusion cavity 74 when it moves to the right.

[0060] In a preferred embodiment, to further improve the space utilization of the extrusion chamber 74, as shown in Figures 6-9, both symmetrical sidewalls of the filter housing 71 protrude outward to form extension cavities 711. The extension length of the right extension cavity 711 is greater than that of the left extension cavity 711, and the left extension cavity 711 only needs to accommodate one support member 722. When multiple support members 722 are in the unfolded state, as shown in Figures 8 and 9, the multiple support members 722 located on one side of the composite filter cloth 200 are moved out of the extension cavities 711 and placed inside the extrusion chamber 74; while the leftmost support member 722 connected to the linear displacement mechanism is placed in the left extension cavity 711. This arrangement allows the composite filter cloth 200 to move as close as possible to both sides of the extrusion chamber. Preferably, the multiple support members 722 located on one side of the composite filter cloth 200 are evenly spaced.

[0061] In this embodiment, two extension cavities 711 are arranged opposite to each other. The longer extension cavity 711 is used to accommodate all the other support members 722 except the support member 722 connected to the linear displacement mechanism when the multiple support members 722 are in the retracted state; while the shorter extension cavity 711 is used to accommodate the support member 722 connected to the linear displacement mechanism when the multiple support members 722 are in the extended state.

[0062] In addition, in this embodiment, since two extension cavities 711 are provided, it is no longer necessary to use the fixing plate provided in Embodiment 1 to fix the guide cylinder 721. In this embodiment, the two ends of the guide cylinder 721 extend into the two extension cavities 711 respectively, and the bottom of the extension cavity 711 and the bottom of the guide cylinder 721 are connected by an elastic support member 724.

[0063] That is, the extension cavity 711 in this embodiment can not only extend the length of the filter shell 71 to accommodate the support member 722, but also serve as a support component for the movable filter assembly 72.

[0064] Example 3: This example is based on Example 1 or Example 2. The difference between this example and Example 1 or Example 2 is that the structure of the support member 722 is improved in this example to reduce the lateral length of the compression cavity 74 occupied by multiple support members 722 when they are gathered or to reduce the extension length of the extension cavity 711, while still having a good support and isolation effect on the stacked composite filter cloth 200.

[0065] In this embodiment, as shown in FIG10, the support member 722 includes a first support body 7221 and a second support body 7222. The second support body 7222 is slidably connected to the first support body 7221. Specifically, a groove can be provided on the inner wall of the first support body 7221, and a protrusion that cooperates with the groove can be provided on the outer wall of the second support body 7222. When multiple support members 722 are in a retracted state, the second support body 7222 is placed inside the first support body 7221, and the second support body 7222 is completely covered by the first support body 7221. When multiple support members 722 are in an extended state, the second support body 7222 moves out of the first support body 7221 and remains slidably connected. In two adjacent support members 722, the second support body 7222 of one support member 722 is connected to the first support body 7221 of the other support member 722 through a connecting line 723.

[0066] Preferably, the top of the guide cylinder 721 is also provided with a guide groove 7212 that cooperates with the second support body 7222; the bottom of the second support body 7222 is slidably disposed in the guide groove 7212, and the guide groove 7212 is arranged parallel to the guide through groove 7211.

[0067] Example 4: This example is based on any one of Examples 1-3. In this example, in order to solve the problem of sludge and mud cake falling into the squeezing chamber 74, as shown in Figures 4 and 5, this example provides a sealing mechanism 12 at the end of the conveying mechanism 6. The sealing mechanism 12 includes a support seat 121 and a lifting mechanism 123 arranged vertically opposite each other.

[0068] The top of the support base 121 is provided with a first clamping plate 122, and the lower end of the lifting mechanism 123 is attached to a second clamping plate 125 via an upper adsorption mechanism 124; the upper adsorption mechanism 124 can be a vacuum suction cup or a magnetic adsorption structure, etc., existing technologies. The lifting mechanism 123 can be any existing technology, such as a hydraulic cylinder or a screw drive structure.

[0069] The second clamping plate 125 and the first clamping plate 122 are detachably connected under the pressure of the support base 121 and the lifting mechanism 123. Specifically, the second clamping plate 125 is provided with multiple protrusions, and the first clamping plate 122 is provided with slots corresponding to the protrusions. The connection between the second clamping plate 125 and the first clamping plate 122 is achieved by inserting the protrusions into the slots.

[0070] The working process of this embodiment is as follows: After the upper filter cloth 3 and the lower filter cloth 5 are combined, they are moved to the sealing mechanism 12 by the conveying mechanism 6. At this position, there is no sludge between the upper filter cloth 3 and the lower filter cloth 5. The lifting mechanism 123 is operated to move downward until the second clamping plate 125 and the first clamping plate 122 come into contact. Then, the upper adsorption mechanism 124 is de-energized and loses its adsorption on the second clamping plate 125. The lifting mechanism 123 is operated to move downward and insert the protrusion into the slot. At the same time, the upper filter cloth 3 and the lower filter cloth 5 are pressed into the slot by the protrusion, thus realizing the connection between the second clamping plate 125 and the first clamping plate 122. Alternatively, after the second clamping plate 125 and the first clamping plate 122 come into contact, the power is not cut off, and the lifting mechanism 123 continues to move downward to insert the protrusion into the slot. Then, the upper adsorption mechanism 124 is de-energized and loses its adsorption on the second clamping plate 125.

[0071] In this embodiment, the ends of the composite filter cloth 200 are sealed by the second clamping piece 125 and the first clamping piece 122, which can prevent sludge from falling into the squeezing chamber 74 during the stacking of the composite filter cloth 200, and can also prevent the mud cake from falling into the squeezing chamber 74 when the upper filter cloth 3 and the lower filter cloth 5 are rolled up after the filter cloth is dewatered.

[0072] Furthermore, the end of the composite filter cloth 200 in this embodiment is provided with a second clamping piece 125 and a first clamping piece 122. When the composite filter cloth 200 is lowered into the extrusion chamber 74, the second clamping piece 125 and the first clamping piece 122 have a certain weight, which makes it easier to guide the composite filter cloth 200 between the two support members 722.

[0073] In a preferred embodiment, the top of the support base 121 is provided with a first clamping piece 122 via a lower adsorption mechanism 126, which facilitates the separation of the first clamping piece 122 and the second clamping piece 125.

[0074] When the upper filter cloth 3 and the lower filter cloth 5 are wound up after the filter press is completed, when the second clamping plate 125 and the first clamping plate 122 move to the support base 121 and the lifting mechanism 123, the lifting mechanism 123 is operated to move downward, and at the same time the upper adsorption mechanism 124 and the lower adsorption mechanism 126 are activated. The upper adsorption mechanism 124 adsorbs the second clamping plate 125 and the lower adsorption mechanism 126 adsorbs the first clamping plate 122. At the same time, the lifting mechanism 123 is controlled to move upward, thereby realizing the separation of the second clamping plate 125 and the first clamping plate 122.

[0075] Example 5: This example is based on any one of Examples 1-4. In this example, the cloth-making mechanism further includes a filter cloth cleaning mechanism installed on the support 100. The filter cloth cleaning mechanism includes a filter cloth cleaning transmission mechanism 11 and a cleaning mechanism 10. The filter cloth cleaning transmission mechanism 11 is used to guide the filter cloth to be cleaned into the cleaning mechanism 10 for cleaning and to roll up the cleaned filter cloth.

[0076] Specifically, as shown in Figure 4, the filter cloth cleaning and conveying mechanism 11 includes a steering roller 111, a first tensioning roller 112, a second tensioning roller 113, a first pressure roller 114, a second pressure roller 115, a third tensioning roller 116, a fourth tensioning roller 117, and a take-up roller 118. In this embodiment, the filter cloth cleaning and conveying mechanism 11 cooperates with the lower filter cloth conveying mechanism 4 to achieve filter cloth conveying. After the lower filter cloth 5 is recovered to the lower take-up roller 41, in order to clean the lower filter cloth 5, one end of the lower filter cloth 5 is sequentially passed through the lower tensioning roller 42, the lower drive roller 43, the steering roller 111, the first tensioning roller 114, the second pressure roller 115, the third tensioning roller 116, the fourth tensioning roller 117, and the take-up roller 118. The turning and tensioning of the tensioning roller 112, the second tensioning roller 113, the first pressure roller 114, the second pressure roller 115, the third tensioning roller 116, and the fourth tensioning roller 117 are transmitted to the winding roller 118 for winding. The first pressure roller 114 and the second pressure roller 115 are located at the cleaning mechanism 10 and are at the same horizontal height. The cleaning mechanism 10 includes a rinsing structure and a wastewater recovery chamber. The first pressure roller 114 and the second pressure roller 115 press the lower filter cloth 5 into the wastewater recovery chamber. After rinsing by the rinsing structure, it is transmitted to the winding roller 118 for winding.

[0077] Example 6: This example is based on any one of Examples 1-4. In this example, the vertical extrusion sludge treatment system further includes a control unit. The control unit includes: an infrared sensor for collecting the distance between the bottom of the movable filter component 72 and the top of the already stacked composite filter cloth 200 during the stacking process; a controller for receiving the distance signal collected by the infrared sensor and determining whether to close the linear displacement mechanism and keep the multiple support members 722 in the unfolded state based on the distance signal; the controller is also communicatively connected to the drive end of the hydraulic mechanism 8; the controller is also communicatively connected to the drive ends of each component in the cloth-laying mechanism.

[0078] In this embodiment, the controller is used to control the actions of the linear displacement mechanism, the hydraulic mechanism 8, and other components to achieve automatic control. The specific control process is conventional control and will not be described in detail here. The inventive point of this embodiment is to determine when it is necessary to keep the multiple support members 722 in the unfolded state by setting an infrared sensor.

[0079] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0080] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

Claims

1. A vertical extrusion sludge treatment system, comprising a cloth feeding mechanism and a filter press mechanism, wherein the cloth feeding mechanism is used to convey a composite filter cloth (200) encased in sludge to the filter press mechanism; characterized in that, The filter press mechanism includes: a filter press chamber (7), which includes a filter housing (71), wherein the filter housing (71) is divided by a filter plate (73) to form an upper squeezing chamber (74) and a lower filtration chamber (75); at least one movable filter assembly (72) is arranged vertically in the squeezing chamber (74), the movable filter assembly (72) includes two guide cylinders (721) symmetrically arranged on the inner wall of the squeezing chamber (74), the bottom of the guide cylinders (721) is elastically connected to the squeezing chamber (74), and a plurality of support members (722) are slidably arranged between the two guide cylinders (721), and adjacent support members (722) are elastically connected; the guide cylinders (721) are provided with A linear displacement mechanism is provided, with two support members (722) located at both ends. One support member (722) is connected to one end of the guide cylinder (721), and the other support member (722) is connected to the linear displacement mechanism. The composite filter cloth (200) is inserted between the two support members (722) at this end. The linear displacement mechanism drives the other support member (722) to reciprocate, so as to realize the expansion or contraction of multiple support members (722) and to realize the composite filter cloth (200) being stacked in the filter pressing chamber (7). A hydraulic mechanism (8) is used to apply vertical pressure to the composite filter cloth (200) stacked in the filter pressing chamber (7).

2. The vertical compression sludge treatment system according to claim 1, characterized in that, The distance between the two supports (722) located on both sides of the composite filter cloth (200) is smaller than the distance between the other two adjacent supports (722).

3. The vertical compression sludge treatment system according to claim 1, characterized in that, One side wall of the filter housing (71) protrudes outward to form an extension cavity (711). When the multiple support members (722) are in a retracted state, the multiple support members (722) are placed in the extension cavity (711).

4. The vertical compression sludge treatment system according to claim 3, characterized in that, The two symmetrical sidewalls of the filter housing (71) protrude outward to form the extension cavity (711); when the multiple supports (722) are in the unfolded state, the multiple supports (722) located on one side of the composite filter cloth (200) move out of the extension cavity (711) and are placed in the compression cavity (74).

5. A vertical compression sludge treatment system according to claim 3, characterized in that, The bottom ends of the guide cylinder (721) are connected to the bottom of the extension cavity (711) via elastic support members (724).

6. The vertical compression sludge treatment system according to claim 1, characterized in that, The support member (722) includes a first support body (7221) and a second support body (7222). The second support body (7222) is slidably connected to the first support body (7221). When the support member (722) is in a retracted state, the second support body (7222) is placed inside the first support body (7221). When the support member (722) is in an extended state, the second support body (7222) moves out of the first support body (7221). In two adjacent support members (722), the second support body (7222) of one support member (722) is elastically connected to the first support body (7221) of the other support member (722).

7. A vertical compression sludge treatment system according to claim 1, characterized in that, The guide cylinder (721) is provided with a guide groove (7211), through which another support member (722) is connected to the linear displacement mechanism.

8. A vertical compression sludge treatment system according to claim 7, characterized in that, When the support member (722) includes a first support body (7221) and a second support body (7222); the top of the guide cylinder (721) is also provided with a guide groove (7212) that cooperates with the second support body (7222).

9. A vertical extrusion sludge treatment system according to any one of claims 1-8, characterized in that, The fabric feeding mechanism includes: an upper filter cloth conveying mechanism (2) for taking in and releasing the upper filter cloth (3) in the composite filter cloth (200); a lower filter cloth conveying mechanism (4) for taking in and releasing the lower filter cloth (5) in the composite filter cloth (200); a feeding mechanism (1) for introducing sludge between the upper filter cloth (3) and the lower filter cloth (5); and a conveying mechanism (6) for conveying the composite filter cloth (200) to the filter press chamber (7).

10. A vertical compression sludge treatment system according to claim 9, characterized in that, The end of the conveying mechanism (6) is provided with a sealing mechanism (12), which includes a support base (121) and a lifting mechanism (123) arranged vertically opposite each other. A first clamping piece (122) is provided on the top of the support base (121), and a second clamping piece (125) is adsorbed at the lower end of the lifting mechanism (123) through an upper adsorption mechanism (124). The second clamping piece (125) and the first clamping piece (122) are detachably connected under the compression of the support base (121) and the lifting mechanism (123).

11. A vertical compression sludge treatment system according to claim 10, characterized in that, The top of the support base (121) is provided with a first clamping piece (122) via a lower adsorption mechanism (126); the second clamping piece (125) is provided with a plurality of protrusions, and the first clamping piece (122) is provided with a slot corresponding to the protrusions.

12. A vertical extrusion sludge treatment system according to claim 9, characterized in that, The fabric collection mechanism also includes a mud cake collection mechanism, which includes a mud cake collection trough (9). The mud cake collection trough (9) is located at the junction of the lower filter cloth transmission mechanism (4) and the conveying mechanism (6) and is used to receive the mud cakes that fall when the lower filter cloth (5) is recycled. The lower end of the mud cake collection trough (9) is provided with a mud cake conveying mechanism (91).

13. A vertical extrusion sludge treatment system according to claim 9, characterized in that, The fabric mechanism also includes a filter cloth cleaning mechanism, which includes a filter cloth cleaning and conveying mechanism (11) and a cleaning mechanism (10). The filter cloth cleaning and conveying mechanism (11) is used to guide the filter cloth to be cleaned into the cleaning mechanism (10) for cleaning, and to roll up the cleaned filter cloth.

14. A vertical compression sludge treatment system according to claim 1, characterized in that, It also includes a control unit, which includes: an infrared sensor for collecting the distance between the bottom of the movable filter assembly (72) and the top of the already stacked composite filter cloth (200) during the stacking process; a controller for receiving the distance signal collected by the infrared sensor and determining whether to close the linear displacement mechanism and keep the multiple support members (722) in the unfolded state based on the distance signal; the controller is also communicatively connected to the drive end of the hydraulic mechanism (8); the controller is also communicatively connected to the drive ends of each component in the fabric mechanism.

15. A sludge treatment method based on the vertical extrusion sludge treatment system according to any one of claims 1-14, characterized in that, The process includes the following steps: S1, the sludge is wrapped between the upper filter cloth (3) and the lower filter cloth (5) by the cloth mechanism to form the composite filter cloth (200), and the composite filter cloth (200) is introduced into the filter press chamber (7); S2, the multiple support members (722) are in an unfolded state to ensure that the composite filter cloth (200) entering the filter press chamber (7) is inserted between two adjacent support members (722); S3, the composite filter cloth (200) is stacked in the filter press chamber (7) by reciprocating movement through the linear displacement mechanism; S4, after the composite filter cloth (200) is stacked, the hydraulic mechanism (8) is started to perform filter press.

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